大断面煤巷软厚顶板失稳机理与支护控制技术  

Instability Mechanism and Supporting Contro Technologyl of Soft Thick Roof in Large Section Coal Roadway

作　　者：王根盛 张伟[2,3] 朱友恒 王东林 张明鹏 

机构地区：[1]山东能源淄矿集团巴彦高勒煤矿,内蒙古鄂尔多斯017300 [2]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [3]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤矿安全》2016年第7期170-173,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51374140;51204102)

摘　　要：针对311102工作面大断面煤巷软厚顶板突发性冒落失稳的问题,结合现场调研,理论分析等方法,分析顶板失稳机理,确定311102工作面辅助运输巷变形力学机制为ICIIBDIIIBC,其软厚顶板和高围岩应力是巷道失稳的主要原因,另一主要原因是较大的巷道跨度造成巷道中部顶板承受了较大的拉应力。针对该种复合型变形力学机制,提出了采用锚网索带支护方式来进行巷道围岩控制。基于数值模拟,证明了锚网索带支护方式对控制围岩变形与塑性区扩展的较好效果。提出311102工作面辅助运输巷补强支护措施,取得了良好的支护效果,保证了安全生产。For the sudden roof caving instability problem of 311102 working face of soft thick coal seam roof in large section coal roadway,combined with field investigation and theoretical analysis,the instability mechanism of roof was analyzed. The roadway deformation mechanical mechanism was ICIIBDIIIBC. One of the major causes of roadway instability was the soft and thick roof and high stress of surrounding rock. Another main cause was that the large span roadway made central roof bear larger tensile stress. For the deformation mechanical mechanism of the roadway,we use the anchor mesh cable belt to control roadway surrounding rock. Based on the numerical simulation,the good effect of anchor mesh cable belt supporting method in controlling the surrounding rock deformation and the plastic zone extension was proved. Reinforcing supporting measures of 311102 working face auxiliary transport gateway was proposed. The good supporting effect was obtained and the safety in production was kept.

关 键 词：软厚顶板 大断面煤巷 变形力学机制 支护控制 冒落 

分 类 号：TD353[矿业工程—矿井建设]